SOLUTION: hello.... plsss help me to solve this question Q1'How much pure alcohol should be added to 400ml of a 15% strength to make its strength 32%?' thank you to help me.....it i

Question 304081: hello....
plsss help me to solve this question
Q1'How much pure alcohol should be added to 400ml of a 15% strength to make its strength 32%?'

thank you to help me.....it is from my Olympiad workbook
sir/mam plss help me...
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
pure alcohol assume 100%
let the requirement be x
400 ml of 15%
total x+400 of 32%
1x+0.15*400= 0.32(x+400)
x+60 = 0.32x+128
x-0.32x= 68
0.68x =68
x=68/0.68
=100 ml

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